89 results about "Coal gasifier" patented technology

The invention belongs to the technical field of dry pulverized coal gasifiers, and discloses an experimental method for CaO to catalyze high-temperature coke high-pressure gasification reaction under different atmospheres, which comprises the following specific steps: step 1, preparing experimental raw materials and pretreating to select representative coal types; the diffusion environment of the industrial gasifier is simulated by establishing a cooperative regulation and control mechanism of pressure, gas velocity and pore structure, the thickness of a boundary layer is calculated according to the Fick diffusion law, a diffusion resistance quantitative relational expression is constructed for dynamic correction, and a variable diffusion strength experimental group is designed to quantify diffusion contribution. The diffusion and reaction rate ratio is quantitatively evaluated through a Weber number model, a catalysis and blank control synchronous experiment is carried out at the same time, a catalysis efficiency factor is calculated, a catalysis-diffusion synergistic phase diagram is drawn, and a reaction control region, a diffusion control region and a transition region are definitely defined; and the risk that the reaction stagnation caused by the fact that the high-pressure diffusion retardation effect is misjudged as catalytic activity attenuation or pore collapse is mistakenly attributed to catalyst deactivation is eliminated.

The invention discloses a processing method of a slag discharge port of a pulverized coal gasification furnace and an anti-blocking structure of the slag discharge port. The processing method comprises the following steps: step A, cutting off the inner wall of the slag discharge port through a cutting machine; b, a nickel-based steel plate smaller than a cut object is welded to the inner wall of the slag discharging opening to form a sealing layer for the inner wall of the slag discharging opening, so that the inner diameter of the slag discharging opening is enlarged to 1100-1200 mm; c, the surface of the nickel-based steel plate is polished to be kept smooth; by cutting off the inner wall of the slag discharging opening and enlarging the inner diameter of the slag discharging opening, the risk of slag blocking during slag discharging of the gasification furnace is avoided, stable operation of the gasification furnace is guaranteed, by arranging an installation ring block, a first protruding block, a dredging assembly, a transmission assembly and a driving assembly, the device can conduct automatic dredging so as to guarantee the good slag discharging effect, the structure is simple, operation is stable, and practicability is high. And the manual labor cost is reduced.

The invention provides a method for optimizing an integrated coal gasification combined cycle process by utilizing solar energy. The method comprises the following steps: generating hydrogen and oxygen through photovoltaic electrolysis of water; the dead steam / oxygen mixed gas is heated through fused salt generated through photo-thermal; the coal gasifier is heated through fused salt generated through photo-thermal; carrying out pre-combustion carbon capture on the cooled synthesis gas through an MOF material with a photoinduced structural transformation property; the synthesis gas subjected to carbon capture in the combustion chamber and the other part of oxygen are subjected to pure oxygen combustion; and cooling the flue gas for carbon capture after combustion. According to the method, the operation load fluctuation, the energy consumption and the carbon capture cost of the coal gasification combined cycle process are reduced, and the overall economy is improved.

The invention discloses a system and method for gasification device, gas-based shaft furnace and electric furnace coupling steelmaking, and belongs to the technical field of ferrous metallurgy. The invention provides a system for gasification device, gas-based shaft furnace and electric furnace coupling steelmaking. The system comprises a pretreatment device, a conveying device, a gasification device, a heat exchange device, a gas-based shaft furnace device, an electric furnace device and a decarburization device. The system is an integrated coal gasification and gas-based shaft furnace system, it is ensured that synthesis gas (mainly including CO and H2) generated by the coal gasification furnace is directly supplied to the shaft furnace, no extra device needs to be added for heating, and energy loss in the intermediate transmission process is reduced by optimizing the technological process. The invention aims to realize efficient coupling of coal gasification, the gas-based shaft furnace and the electric furnace by optimizing the system flow, improving the energy utilization efficiency and reducing the production cost.

The invention discloses a low-resilience sprayed concrete admixture as well as a preparation method and application thereof, and relates to the technical field of engineering materials. The admixture is prepared from the following raw materials in parts by weight: 400 to 500 parts of silica fume, 100 to 250 parts of fluffy ash, 200 to 320 parts of pretreated coal gasification furnace slag micro powder, 20 to 30 parts of disodium dihydrogen pyrophosphate, 10 to 15 parts of sodium dihydrogen phosphate, 20 to 30 parts of sodium hexametaphosphate, 5 to 10 parts of rubber powder and 5 to 10 parts of cellulose ether. The preparation method comprises the following steps: weighing the raw materials in parts by weight, adding the raw materials into a concrete mixer, and uniformly stirring for 15-30 minutes; and bagging the uniformly stirred mixture to obtain the low-resilience sprayed concrete admixture. The obtained admixture is applied to sprayed concrete, and the low-resilience sprayed concrete is obtained. The problems that existing coal gasification slag sprayed concrete is low in construction efficiency, and the engineering quality is difficult to meet the requirements are solved.

The invention relates to the technical field of catalyst sulfuration in a coal gasification process, and particularly discloses a method for sulfuration of a shift catalyst by adding sulfur into low-sulfur coal, and the method comprises the following steps: fully mixing byproduct sulfur with boiler slag by adopting an internal mixing process to prepare a slag-sulfur mixture; fully and uniformly mixing the slag-sulfur mixture with low-sulfur coal, and feeding the mixture into a coal mill for milling to obtain pulverized coal; the method comprises the following steps: in a coal gasifier, carrying out online vulcanization on a shift catalyst by using pulverized coal, setting slag sampling once every half an hour after adding a slag-sulfur mixture, and monitoring the H2S concentration, the ash water pH value and the sulfate radical concentration in the synthesis gas in real time. According to the method, the by-product sulfur and the boiler slag are subjected to banburying compounding to prepare the slag-sulfur mixture, the slag-sulfur mixture and the low-sulfur coal are uniformly mixed in proportion to prepare powder, and by controlling the outlet temperature of the coal mill, the circulating air volume and the pressurized conveying temperature, the stable combustion of the coal powder and the on-line vulcanization of the shift catalyst are realized.

The invention relates to the technical field of concrete, and discloses a method for preparing coal gasification furnace slag concrete, which comprises the following steps of: mixing mixed fine aggregate of pebbles, sand and coal gasification furnace slag, a binding material, a composite exciting agent and water according to the total mass of 100 parts of the mixed fine aggregate of the pebbles, the sand and the coal gasification furnace slag, the binding material, the composite exciting agent and the water, and uniformly mixing the mixed fine aggregate of the pebbles, the sand and the coal gasification furnace slag, the binding material, the composite exciting agent and the water, the usage amounts of the mixed fine aggregate of the stones, the sand and the coal gasification furnace slag, the cementing material, the composite exciting agent and the water are respectively 40-45 parts, 24-40 parts, 15-22 parts, 1-5 parts and 5-10 parts, the mass of the coal gasification furnace slag is 35-65% of the mass of the mixed fine aggregate of the sand and the coal gasification furnace slag, and the composite exciting agent comprises a CaO-based early strength agent, phosphogypsum, a lithium salt and an alkali solution. The compact degree of a concrete matrix is greatly improved, so that the mechanical property and the durability index of the concrete are effectively improved, and particularly, the compressive strength and the chloride ion penetration resistance are remarkably improved.

The invention relates to the technical field of coal chemical industry, in particular to a method for evaluating the slag quantity of a dry pulverized coal gasifier in real time, which comprises the following steps: arranging a thermometer in a slag pool of the dry pulverized coal gasifier, arranging a thermometer and a flowmeter behind a quenching water heat exchanger, and arranging a regulating valve on a cooling water outlet pipeline of the quenching water heat exchanger; adjusting the outlet flow Q of the slag water circulating pump to be a constant value according to the reading of the flowmeter; the temperature t of the quenching water after the quenching water heat exchanger is controlled to be a constant value by using a regulating valve and a temperature controller of a cooling water outlet pipeline; based on the principle that the specific heat capacity of quenching water and molten slag and the temperature of the molten slag before quenching are constant, the real-time slag production amount of the gasifier is calculated through a preset formula, the method for evaluating the slag production amount of the dry pulverized coal gasifier in real time can evaluate the slag production amount of the dry pulverized coal gasifier in real time, guide personnel to carry out as-fired coal operation adjustment, and improve the slag production amount of the dry pulverized coal gasifier. Frequent fluctuation of the slag yield of the gasifier is avoided, and safe and stable operation of the burner cover and the slag conveyor is ensured.

According to the energy-saving device and method for graded pressure charging and releasing of the coal feeding device of the coal gasifier, the control system is used for coordinating the two coal feeding systems to alternately execute coal feeding, pressure charging, discharging and pressure releasing operations. And during coaling, opening the coal lock upper valve of the coal lock of the corresponding coaling system, and enabling the coal in the coal bunker to fall into the coal lock through the coaling chute until the set coaling quantity is reached. During pressurizing, the control system sequentially opens the pressurizing valves in the pressurizing branches according to the pressure grade from low to high, and the coal lock gas in the coal lock gas buffer pipe is used for pressurizing the coal lock. And during discharging, a coal lock lower valve of the coal lock is opened, and coal enters the gasification furnace from the transition bin. During pressure relief, according to the same principle, the control system sequentially opens the pressure relief valves in the pressure relief branches from the high pressure level to the low pressure level until pressure relief is completed. Through the graded pressure charging and discharging design, graded collection is performed according to pressure grades during pressure discharging, and meanwhile, the system is recycled as a pressure charging gas source, so that the system is more efficient, energy-saving and environment-friendly, the configuration scale of the coal lock gas compressor can be effectively reduced, and the energy consumption loss is reduced.

The present invention discloses a method for predicting and controlling erosion of a coal gasifier pipeline, which belongs to the technical field of safe transportation of industrial pipelines and is divided into four layers, wherein the first layer is a perception layer; the second layer is a monitoring layer; the third layer is a digital twin computing layer, and the fourth layer is a decision layer; the erosion morphology of the pipeline is displayed in real time, the erosion position of the pipeline is predicted, and the data of the collision of solid impurities in the pipeline with the pipe wall is collected, transmitted, analyzed and fed back in real time, so as to find the erosion position of the gas pipeline wall in advance and take protective measures as soon as possible. The core of the present invention is to connect CFD numerical simulation with the digital twin system, and use the intelligent solver to generate an intelligent algorithm. Complex physical behaviors can be monitored as the real process progresses, so as to respond to changes in real-time input data, which not only meets the needs of calculating real-time data, but also can improve the simulation accuracy of the digital twin, so that the constructed digital twin can be quickly applied to the erosion prediction of the pipeline.

The invention provides block coal gasification furnace equipment with a pre-combustion chamber and a block coal gasification method, and belongs to the technical field of gasification furnaces. The fixed bed gasification furnace comprises a furnace body, wherein the furnace body is provided with a furnace chamber; an oxidation zone is arranged in the furnace chamber; the lump coal gasification furnace equipment further comprises a pre-combustion chamber arranged on the furnace body, a combustion cavity is formed in the pre-combustion chamber, the combustion cavity is used for combusting pulverized coal, and an oxygen pipe, a waste liquid pipe and a feeding pipe which are communicated with the combustion cavity are arranged on the pre-combustion chamber; the breather pipe is arranged on the furnace body, one end of the breather pipe is communicated with the combustion cavity, and the other end of the breather pipe is communicated with the oxidation area. The fixed bed gasifier can effectively prevent uneven reaction of lump coal and blockage of the deslagging channel, and ensures long-period stable operation of gasification equipment.

The utility model discloses a complete cooling copper water jacket for a coal gasification hearth, which comprises an upper hearth water jacket, a lower hearth water jacket and a slag discharge port water jacket which are sequentially arranged on the inner wall of the hearth from top to bottom in the vertical direction, and the hearth water jacket comprises a conical wall body and a lower hearth connecting flange. The lower hearth water jacket comprises a horn-shaped wall body, an upper hearth connecting flange and a slag discharge port connecting flange, the lower hearth connecting flange and the upper hearth connecting flange are fixed through bolts, and the slag discharge port water jacket comprises a funnel-shaped wall body and a sealing flange. A cooling pipe circling along the wall body is arranged in each of the conical wall body, the horn-shaped wall body and the funnel-shaped wall body. The complete cooling copper water jacket for the coal gasification furnace solves the technical problems of poor high-temperature corrosion resistance, poor cooling effect, inconvenience in replacement, assembly and disassembly and short service life.

The invention discloses a method for predicting water-cooling heat exchange steam yield of a coal gasifier. The method comprises the following steps: establishing a heat exchange load mathematical model I for calculating a pyrolysis area of the coal gasifier and a heat exchange load mathematical model II for calculating a gasification area of the coal gasifier; establishing an energy balance mathematical model III of water-cooling heat exchange load of the coal gasifier and steam heat energy output by a steam pocket; parameters of the heat exchange load mathematical model I and the heat exchange load mathematical model II of the coal gasifier running in real time are obtained; parameters of a steam pocket running in real time are obtained; correcting the heat transfer coefficient of the water-cooled pipe in the pyrolysis area of the coal gasifier and the heat transfer coefficient of the water-cooled pipe in the gasification area of the coal gasifier; and predicting the water-cooling heat exchange load of the coal gasifier in real-time operation. According to the method, the calculation of the thermal load is combined into simulation software. According to the method, different calculation methods are adopted for calculation areas of models in different stages of pyrolysis and gasification of the water-cooled wall coil of the gasification furnace, and the problem that engineers cannot determine the thermal load of the water-cooled pipe for pyrolysis and gasification in the simulation process of the gasification furnace is solved.

The utility model relates to the technical field of coal gas purification and dust removal, and discloses a gasification furnace coal gas dust filtering and diffusing device which comprises a bag-type dust remover, a coal gas diffusing assembly and an automatic ash removal assembly, the bag-type dust remover is provided with a first ash outlet, a first inlet and a first outlet, and the first inlet is used for being communicated with a gasification furnace; the gas diffusion assembly is communicated with the first outlet; the automatic ash removal assembly comprises a back flushing component and an ash conveying component, the back flushing component is arranged at the first outlet, and the ash conveying component is arranged at the first ash outlet. The bag-type dust collector is used for carrying out dust removal treatment on coal gas diffused from the gasification furnace, the coal gas diffusing assembly is used for igniting carbon monoxide and hydrogen in unqualified coal gas, and the automatic ash cleaning assembly is used for cleaning dust accumulated in the bag-type dust collector; according to the gas dust filtering and diffusing device for the gasification furnace, the pulverized coal gasification furnace can be started and shut down according to production requirements, emergent diffusion and pressure relief of gas can be carried out in emergency, and the production flexibility and safety of the pulverized coal gasification furnace are improved.

The utility model discloses a pulverized coal gasification furnace with a coal storage device, which comprises a gasification furnace body, a mounting plate is arranged on the side wall of the gasification furnace body, a coal storage tank is arranged on the mounting plate, and the pulverized coal gasification furnace further comprises a feed conveying mechanism and a crushing and stirring mechanism which are arranged on the coal storage tank; the feeding conveying mechanism comprises a discharging pipe and a conveying pipe, the discharging pipe is arranged on the bottom wall of the coal storage tank, the conveying pipe is connected to the tail end of the discharging pipe, the tail end of the conveying pipe is arranged in the gasifier body in a penetrating mode and provided with a discharging opening, and a feeding assembly is arranged in the conveying pipe. The utility model belongs to the technical field of pulverized coal gasification furnaces, and particularly relates to a pulverized coal gasification furnace with a coal storage device.

Embodiments of the present invention provide a zero carbon emission system and method for deep peak regulation by coal gasification coupled with a power station boiler. The zero carbon emission system comprises a coal gasifier, a power station boiler, a carbon dioxide storage tank, and a gasification agent mixer. A first gasification gas nozzle of the coal gasifier is communicated with a main burning zone of a boiler body of the power station boiler, a second gasification gas nozzle of the coal gasifier is communicated with a reburning zone of the boiler body of the power station boiler, and an outlet of the boiler body of the power station boiler is communicated with the carbon dioxide storage tank, so as to collect carbon dioxide. The carbon dioxide storage tank is further communicated with the gasification agent mixer, and the gasification agent mixer is communicated with the coal gasifier. The gasification agent mixer is used for mixing extracted steam from a steam turbine and part of carbon dioxide in the carbon dioxide storage tank, so as to generate a gasification agent for supply to the coal gasifier to realize deep peak regulation. According to the zero carbon emission system in the embodiments of the present invention, the coal gasifier is deeply coupled with the power station boiler, so that low-load stable combustion under deep peak regulation of the power station boiler and zero carbon emissions of the entire system are realized.

The embodiment of the invention provides a method and a system for guiding new coal purchase of a coal gasifier by using digital twinning. The method comprises the following steps: determining basic physical properties of a coal type to be processed; based on the basic physical property of the to-be-treated coal type, the gasification temperature range of the to-be-treated coal type is obtained through a viscosity-temperature equation; and determining a water-coal ratio and an oxygen-coal ratio when the objective function is optimal through a linear approximation algorithm by taking the economic benefit as the objective function, taking the gasification temperature range as a constraint condition, depending on process simulation software and taking the water-coal ratio and the oxygen-coal ratio as adjusting parameters, so as to determine the optimal new coal type.

The invention provides an automatic control method and device for multi-pulverized coal line conveying of a dry powder coal gasifier. The automatic control method comprises the following steps: receiving various constraint conditions input on a DCS (Distributed Control System) operation interface; collecting operation data of each coal preparation line and operation data of each gasification furnace; according to various constraint conditions, the operation data of each coal preparation line and the operation data of each gasification furnace, determining to start a single coal preparation line or two or more coal preparation lines to convey pulverized coal; if the single coal preparation line is started to convey the pulverized coal, executing a preset single coal preparation line conveying strategy; and if the two or more coal preparation lines are started to convey the pulverized coal, executing a preset conveying strategy of the two or more coal preparation lines. Therefore, the automatic identification and selection of the pulverized coal preparation line can be realized, a plurality of pulverized coal lines are fully automatically controlled to convey pulverized coal to the gasification furnace, the human intervention is reduced, the untimely and inaccurate human judgment is avoided, and the pulverized coal conveying safety is obviously improved.

The utility model discloses coal gasification furnace slag granulating equipment, coal gasification furnace slag granulating equipment includes the material conveying mechanism, material modification mechanism, material binding mechanism, material granulating mechanism and material drying mechanism that connect gradually, and material modification mechanism includes acid -base adjusting subassembly and modification subassembly. The utility model discloses the application of coal gasification furnace slag granulating equipment system, and the preparation time of granular adsorbing material is shortened significantly, saves manpower and space cost, and improves the granulating efficiency.

The utility model discloses a large lignite gasifier with high productivity and convenience in operation. The large lignite gasifier comprises a gasifier main body and a deslagging device arranged below the gasifier main body, the gasification furnace body comprises a furnace shell, a furnace pipe, a water jacket, a conical combustion chamber located on the lower portion of the furnace pipe, a coal gas outlet pipe located on the upper portion of the furnace pipe, an observation opening formed in the furnace shell and extending to the furnace pipe, a coal feeding opening formed in the top face of the furnace pipe, an annular air supply chamber located on the lower portion of the furnace shell, a first draught fan and an air supply pipe communicating the annular air supply chamber with the combustion chamber. More than two groups of observation ports with openable door plates are arranged at intervals along the height of the furnace pipe, and 3-4 observation ports are arranged at intervals around the furnace shell in each group; an enhanced blast pipe is arranged at the bottom of the conical combustion chamber and is externally connected with a second fan; the deslagging device comprises a box body, a fixed plate and a rotating plate, wherein the fixed plate and the rotating plate are arranged at the top of the box body; and a slope plate is arranged in the box body. According to the utility model, the gas output can be increased, the quality and efficiency of the produced gas can be ensured, the operation is easy, and the labor is saved.

The utility model relates to coal gas generating equipment technical field discloses a coal storage device of pulverized coal gasification furnace, including coal storage hopper, the rear surface lower extreme of coal storage hopper is provided with opening and closing mechanism, and the front surface and inside of coal storage hopper are provided with anti -blocking mechanism jointly, the utility model discloses a anti -blocking mechanism is provided with, and anti -blocking mechanism effectively solved the jam problem that the coal powder leads to electrostatic force adsorption, water content agglomeration, particle bridging or inner wall adhesion, the stirring vane can dynamically break up the coal body of group coal and scatter the mechanical interlock between particles, and the scraper assembly continuously scrapes the wall adhesive layer of bin through the elastic compensation mechanism, and the flow line type material guiding design of three -segment type coal storage structure is combined, and the coal powder flow resistance is reduced significantly, the device activates the function of breaking down in the process of opening and closing linkage simultaneously, avoids the intermittent operation defect of traditional pneumatic arch breaking, can prevent the metamorphic, gas channeling and local cavity risk caused by coal powder retention, improves the continuity and reliability of the coal feeding system as a whole.

An activated carbon and silica sol supported slag melting agent for a high-calcium coal gasifier comprises 5-10 parts of an expansion bulking agent, 10-20 parts of a catalytic slag melting agent and 40-60 parts of a high-temperature oxidant, and has the beneficial effects that substances such as activated carbon and borax in the expansion bulking agent can promote the fluffiness of an ash structure; under the cooperation action with a catalytic slag melting agent and a high-temperature oxidizing agent which are added into the raw materials, high-melting-point silicon-aluminum components and calcium-containing minerals in the ash slag are subjected to a certain chemical reaction at a low temperature to form a low-temperature eutectic melt, the fluidity is enhanced, the melting temperature of the ash slag is reduced, and the ash slag is promoted to be converted into fluidization; a proper dosage is selected according to the property of slag, the slag melting agent is sprayed into a nozzle above a slag discharging opening of a gasification furnace using high-calcium coal, liquid slag discharging can be achieved at the temperature of about 900 DEG C, and the problems that gas resources are wasted and cost is increased due to the fact that natural gas is used are effectively solved. And meanwhile, the economic loss caused by non-planned shutdown of the gasification furnace due to slag blockage is effectively avoided.

This invention relates to a unique cycle for generating electricity at high efficiency and with zero carbon emissions. The cycle's fundamental energy carrier is hydrogen (H2), with H2 undergoing each unit process in the cycle either within water (H2O) molecules or as H2 gas. The heat source driving the cycle, through generation of steam, is a small nuclear reactor known in the industry as a small modular reactor (SMR). This steam's primary purpose is to provide the feed source for H2 production, which occurs in an Underground Coal Gasifier (UCG). The invention's high generation efficiency, accompanied by zero carbon emissions, derive from the UCG's steam / coal reactions and from conversion of the H2 into electricity by solid oxide fuel cells (SOFCs). These SOFCs produce, as their only waste stream, pure H2O. This H2O is then fed back for steam generation using the SMR's heat, which re-initiates the cycle. All unit processes use proven, commercially available technologies. The invention is directly applicable to any location where significant coal deposits exist.

The invention provides a coal burning device for a coal gasifier, and relates to the technical field of pulverized coal gasification, the coal burning device comprises a burner and a protective cover, a hole for mounting the burner is formed in the middle of the protective cover, the burner is coaxially mounted corresponding to the hole of the protective cover, the protective cover is bowl-shaped, and a cooling mechanism is mounted on one side, opposite to a nozzle of the burner, of the protective cover; slag is drained and blocked through the protective cover, meanwhile, flowing of the slag can be accelerated, blockage of the burner caused by excessive accumulation of the slag on the protective cover is avoided, and then the protective cover can be prevented from being burnt out by side air injection of the burner; the protection cover can be prevented from being damaged due to overheating, and the service life of the protection cover is prolonged.

The invention belongs to the technical field of mine roadway support, and particularly relates to a mining flexible thin-layer two-component spraying material and a preparation method thereof. The mining flexible thin-layer two-component spraying material comprises a material A and a material B, the material A comprises an EVA emulsion and a coalescing agent; the material B comprises the following components in parts by weight: 20-40 parts of melamine modified urea resin powder, 5-10 parts of a curing agent, 40-70 parts of coal gasification furnace slag, 3-7 parts of expanded graphite, 3-5 parts of alpha-zirconium phosphate, 1-2 parts of a coupling agent and 0.05-0.3 part of fibers. The mining flexible thin-layer spraying material is small in rebound rate, good in adhesion and beneficial to inhibition of crack propagation.

The present invention relates to the field of gasification in atmospheric pressure fixed-bed gasifiers, particularly a coal tar in-situ high-temperature catalytic cracking gasifier device and process. The gasifier is a three-stage gasifier. The drying section is connected to the dry distillation section via a second stoker, which is then connected to the gasification section via a third stoker. The lower portion of the dry distillation section is connected to the upper portion of the drying section via a pipeline. The top of the dry distillation section is connected to the gasification reaction layer at the bottom of the gasification section via a gas guide pipe. The drying section is connected to the top of the gasification section, and a waste heat recovery device is installed on the gas outlet pipeline at the top of the gasification section. A portion of the pressurized gas is returned to the dry distillation section for combustion in the backfire gas burner. The hot flue gas from the combustion enters the dry distillation section to dry distill the coal material. The resulting tar-rich dry distillation gas is discharged from the top of the dry distillation section. The remaining portion of the gas enters an indirect cooler to cool the gas. The tar in the dry distillation gas is catalytically cracked to produce gas rich in non-condensable combustible gases, with a tar cracking rate exceeding 85%.

The present invention discloses a pulverized coal gasifier synthesis gas quenching device and method, belonging to the technical field of pulverized coal gasifier synthesis gas treatment; the device and method comprise a wastewater tank, a water supply quenching pump, an electromagnetic flow control valve, a venturi nozzle and a temperature sensor; the wastewater tank is connected to the venturi nozzle via a wastewater pipeline, and the venturi nozzle is connected to a quenching pipe on the top of the pulverized coal gasifier; a water supply quenching pump is provided on the wastewater pipeline; the quenching pipe is connected to a temperature sensor; the temperature sensor is connected to a controller, and the controller is connected to the electromagnetic flow control valve; the present invention utilizes wastewater spray to cool the synthesis gas in the quenching pipe, which has an energy-saving effect on the one hand, and on the other hand increases the H / C value of the synthesis gas, thereby extending the service life of the catalyst.

The invention relates to the field of coal-fired boilers, in particular to an ultralow-load stable-combustion pre-gasification coupling combustion system which comprises a boiler furnace, each combustion layer of the boiler furnace is provided with a direct-current combustor and a pre-gasification combustor, the direct-current combustors are arranged at the four corners of the boiler furnace, and the pre-gasification combustors are arranged at the four corners of the boiler furnace. The pre-gasification combustors are arranged on four walls of a boiler furnace, and flames jetted by the pre-gasification combustors and flames jetted by the direct-current combustors are intersected and coupled in the center of the boiler furnace; and the pulverized coal gasification furnace is used for providing gasification products for the pre-gasification combustor, and the gasification products comprise gasification gas. The problems that in the prior art, safety is poor, consumption is large, and stable combustion cannot be achieved are solved.

A coal gas pretreatment system of a coal gasifier belongs to the technical field of coal gasifiers. Which comprises a coal bunker (2) used for conveying solid coal to a coal gasifier, and is characterized in that a coal gas output pipeline (4) is arranged on one side of the upper portion of the coal bunker (2) and connected with the input end of a gas mixer (8), the other input end of the gas mixer (8) is connected with a gas input unit, and the output end of the gas mixer (8) is connected with an inlet of an induced draft fan (10); and an outlet of the induced draft fan (10) is connected into the coal gasifier. In the coal gas pretreatment system of the coal gasifier, the coal gas containing tar in the coal bunker is pumped out through the coal gas output pipeline, so that on one hand, air pollution caused by direct emission of the coal gas is avoided, and on the other hand, the coal gas is fed into the coal gasifier to serve as fuel for secondary use; and the concentration of coal gas in the mixed gas is lower than the explosion limit through the gas mixer, so that the safety is improved.

The application provides a dry pulverized coal gasifier multi-pulverized coal line conveying automatic control method and device, which comprises the following steps: receiving various constraint conditions input on a DCS operation interface; collecting operation data of each coal preparation line and operation data of each gasifier; determining to start a single coal preparation line or two or more coal preparation lines for pulverized coal conveying according to the constraint conditions, the operation data of each coal preparation line and the operation data of each gasifier; if the single coal preparation line is started for pulverized coal conveying, a pre-set single coal preparation line conveying strategy is executed; if two or more coal preparation lines are started for pulverized coal conveying, a pre-set two or more coal preparation line conveying strategy is executed. Thus, the self-identification and selection of the coal preparation line can be realized, the pulverized coal conveying to the gasifier is fully automatically controlled, the human intervention is reduced, the timeliness and accuracy of the human judgment are avoided, and the safety of the pulverized coal conveying is significantly improved.